Fast Spiral Jobbers Length Twist Drill
NACHI Fast Spiral Jobbers Length Twist Drills - Cutting Direction: Right Hand   Size : 7/16   Tool Material: H.S.S.   Shank Style: Straight shank   Drill Type: Jobbers Length

Fast Spiral Jobbers Length Twist Drill

Item #: 01-004-728
Brand: NACHI
Size: 7/16"
Size Type: Fractional
Tool Material: High Speed Steel
Fast Spiral Jobbers Length Twist Drill is no longer available for purchase. If you need information about product substitutions, please contact one of our customer service representatives at 1-800-221-0270 or click the chat button at the top of the page.
For soft materials such as aluminum, magnesium, copper alloy, etc.


  • For drilling operations in low tensile strength, softer materials that may pose problems with chip ejection. Typically the materials drilled with these drills are softer ferrous metals and alloys, such as soft steels and soft cast iron.
  • Soft non-ferrous metals and alloys, such as aluminum, magnesium, copper and zinc alloys may also be machined with these drills
  • Combination of fast spiral and high helix angle as well as the wider flutes provide very efficient chip movement and ejection.
  • For many different applications with hand held manual drills and either portable or stationary machine tools.
  • Lubricating/cutting oils or the appropriate coolant fluids are recommended to achieve the optimal performance and the best tool life.


  • Right hand (clockwise rotation) cutting direction.
  • Standard two flute design with wider flutes.
  • Fast spiral, high helix flutes.
  • Helix angle: 34°- 40°
  • Straight shanks that correspond to drill diameter.

Technical Data

  • Manufactured from high speed steel.
  • Precision ground flutes.
  • Cylindrically ground.
  • General purpose drills for soft materials.
  • 118° point angle and standard web thickness.
  • Bright finish.
NACHI L503 118° Point HSS Ground Bright Fractional Fast Spiral Jobbers Length Drills
Product Specifications
Size 7/16"
Size Type Fractional
Tool Material High Speed Steel
Finish Coating Bright Finish
Drill Point Angle 118°
Decimal Size .4375"
Drill Grade General Purpose
Drill Type Jobbers Length
Diameter .4375"
Cutting Direction Right Hand
Flute Shape Fast Spiral, High Helix Flute
Hardness 58 to 60 RC
Helix Angle 34° -40°
Manufacturing Method Ground
No. of Flutes 2
Helix Angle & Style 34° -40°
Overall Length 5-1/2"
Point Sharpening Type Normal Point
Length Style Jobbers Length
Series L503
Shank Style Straight Shank
Type Fast Spiral Jobbers Length Twist Drills
Weight 0.14 lbs.
Country of Origin JAPAN

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